Final answer:
Osteoporosis is a condition where bones become weak and brittle due to inadequate calcium intake or poor absorption, often happening in older adults. It is associated with factors such as low vitamin D levels, hypoparathyroidism, and hormonal changes.
Step-by-step explanation:
When a person does not have enough calcium in their diet, a weakening of the bone occurs, which is called osteoporosis. This condition is characterized by a decrease in bone density, leading to bones that are brittle and more susceptible to fractures. Osteoporosis can result from insufficient dietary calcium, poor absorption of calcium due to low levels of activated vitamin D, or conditions such as hypoparathyroidism which can lead to decalcification of bones.
Factors such as increased alkaline phosphatase activity and hormonal imbalances can also contribute to this disorder. Although it most commonly occurs in older adults, maintaining adequate calcium and vitamin D intake is important throughout life to prevent its onset. Treatments for osteoporosis focus on bone density maintenance and fracture prevention.